For half a century, the European Space Agency (ESA) has been serving Europe as its space agency and inspiring its citizens. On 30 May 1975, the ESA Convention was signed by 10 founding Member States and has since now expanded to 23 Member States, three Associate Members, four Cooperating States and a Cooperation Agreement with Canada. This anniversary year provides the opportunity to reflect not only on ESA’s past achievements, but even more so on its future perspectives.